<template>
<div class="app-container">
 <!-- 讲师表单 -->
<el-form  label-width="120px">

  <el-form-item label="讲师名称">
    <el-input v-model="teacher.name"></el-input>
  </el-form-item>

    <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right"
        min="0"/>
    </el-form-item>

  <el-form-item label="讲师头衔">
    <el-select v-model="teacher.level" clearable placeholder="请选择">
      <el-option label="高级讲师" value="1"></el-option>
      <el-option label="首席讲师" value="2"></el-option>
    </el-select>
  </el-form-item>

 <el-form-item label="讲师资历">
    <el-input v-model="teacher.career" ></el-input>
  </el-form-item>

 <el-form-item label="讲师简介">
    <el-input v-model="teacher.intro" :rows="10" type="textarea"></el-input>
  </el-form-item>

<!-- 讲师头像  -->
<el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload"
        @click="imagecropperShow=true">更换头像
        </el-button>
        <!--
        v-show：是否显示上传组件
        :key：类似于id，如果一个页面多个图片上传控件，可以做区分
        :url：后台上传的url地址
        @close：关闭上传组件
        @crop-upload-success：上传成功后的回调 -->
        <image-cropper
        v-show="imagecropperShow"
        :width="300"
        :height="300"
        :key="imagecropperKey"
        :url="BASE_API+'/eduoss/fileoss/upload'"
        field="file"
        @close="close"
        @crop-upload-success="cropSuccess"/>
</el-form-item>

<el-form-item>
    <el-button :disabled="saveBtnDisabled" type="primary" 
    @click="saveOrUpdate()">保存</el-button>
</el-form-item>
 
</el-form>

</div>
</template>



<script>
// 引入讲师api
import teacher from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'



export default {
    components: { ImageCropper, PanThumb },

    data(){
        return{
            teacher:{
                name: '',
                sort: 1,
                level: '',
                career: '',
                intro: '',
                avatar: ''
            },
            //禁用保存按钮
            saveBtnDisabled: false,
            //是否显示上传组件
            imagecropperShow: false,
            //上传组件id
            imagecropperKey: 0,
            //接口api
            BASE_API: process.env.BASE_API

        }
    },
   
    methods:{
        //初始化
        init(){
            //判断路径中是否有id值
        if(this.$route.params && this.$route.params.id){
            //从路径获取id值
            const id = this.$route.params.id
            //调用根据id查询的方法
            this.getTeacerById(id)
        }else{
            this.teacher={}
        }
        },  
        //上传头像关闭方法
        close(){
              this.imagecropperShow = false
              // 上传成功后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
                this.imagecropperKey =this.imagecropperKey+1

        },
        //上传头像成功方法
        cropSuccess(data){
             console.log(data)
             this.imagecropperShow = false
             this.teacher.avatar =data.url
             // 上传成功后，重新打开上传组件时初始化组件，否则显示上一次的上传结果
            this.imagecropperKey = this.imagecropperKey+1
        },

        //根据讲师id查询
        getTeacerById(id){
                teacher.getTeacherById(id)
                .then(response =>{
                  this.teacher=  response.data.teacher
                })
                // .catch(error =>{

                // })
        },
        //添加讲师调用
        saveOrUpdate(){

            //判断 修改 还是添加
            if(this.teacher.id){
                // 有id就修改
                //修改
                this.updateTeacher()
            }else{
                //添加
                 this.addTeacher()    
            }

        },

        //添加讲师
        addTeacher(){
            teacher.addTeacher(this.teacher)
            .then(response =>{
                //提示信息
                this.$message({
                type: 'success',
                message: '添加成功!'
                });
                //回到列表 路由跳转 
                this.$router.push({path: '/teacher/table' })
            })
            .catch(error =>{
                this.$message({
                type: 'info',
                message: '添加失败'
            }); 
            })
        },

        //修改讲师方法
        updateTeacher(){
            teacher.updateTeacher(this.teacher)
            .then(response =>{
                 //提示信息
                this.$message({
                type: 'success',
                message: '修改成功'
                });
                
                //回到列表 路由跳转 
                this.$router.push({path: '/teacher/table' })                               
            })
            .catch(response =>{
                this.$message({
                type: 'info',
                message: '修改失败'
            });          
            })
        }
    },
    created(){
        this.init()
    },
    //监听
    watch:{
        $route(to,from){ //监听 路由变化，执行 清空表单方法 
            console.log('watch $route')
            this.init()
        }   
    }
    
}
</script>